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Thread: Ubuntu 20.04 -- What are "stale online ext4 metadata check snapshots"

  1. #11
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    Re: Ubuntu 20.04 -- What are "stale online ext4 metadata check snapshots"

    Here is what I get when I type in sudo lvdisplay

    The LV status is available.

    Can someone unpack what you see?

    What does current LE mean?

    I take it that the swap space is automatically part of the Ubuntu installation. See https://help.ubuntu.com/community/SwapFaq

    Do I conclude from the code below that LVM is also automatically part of the Ubuntu 20.04 installation and can then be used by entering specific commands -- or not?

    Code:
    --- Logical volume ---
      LV Path                /dev/vgubuntu/root
      LV Name                root
      VG Name                vgubuntu
      LV UUID                VYh3ay-F9Ab-tb8G-2Oak-8a6Q-Tta5-dZTrWv
      LV Write Access        read/write
      LV Creation host, time ubuntu, 2023-03-31 12:46:27 +0200
      LV Status              available
      # open                 1
      LV Size                462,84 GiB
      Current LE             118488
      Segments               1
      Allocation             inherit
      Read ahead sectors     auto
      - currently set to     256
      Block device           253:1
       
      --- Logical volume ---
      LV Path                /dev/vgubuntu/swap_1
      LV Name                swap_1
      VG Name                vgubuntu
      LV UUID                KZAhTF-dCsA-Pbb1-r6V0-RJPH-j8d0-0Ptrcc
      LV Write Access        read/write
      LV Creation host, time ubuntu, 2023-03-31 12:46:27 +0200
      LV Status              available
      # open                 2
      LV Size                976,00 MiB
      Current LE             244
      Segments               1
      Allocation             inherit
      Read ahead sectors     auto
      - currently set to     256
      Block device           253:2
    Last edited by bhubunt; April 12th, 2023 at 12:02 PM.

  2. #12
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    Re: Ubuntu 20.04 -- What are "stale online ext4 metadata check snapshots"

    Did you select encryption during installation?
    (Edit - Long time since I installed 20.04, but looking back at the guide it suggests you have to select LVM to be offered Encryption, not the other way around, and you said in #3 you didn't activate LVM).
    Last edited by maglin2; April 12th, 2023 at 07:45 PM.

  3. #13
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    Re: Ubuntu 20.04 -- What are "stale online ext4 metadata check snapshots"

    Quote Originally Posted by maglin2 View Post
    Did you select encryption during installation?
    +1

    What does current LE mean?
    You almost had me on that one, had to have a second cup of coffee for that one.
    Meaning:"logical extent (LE)", Each logical volume is split into chunks of data, known as logical extents. The extent size is the same for all logical volumes in the volume group.
    Or as (PE) physical extent (PE)
    if you use certain back-up tools LMV could be pulled in.
    Do I conclude from the code below that LVM is also automatically part of the Ubuntu 20.04 installation and can then be used by entering specific commands -- or not?
    I'm not certain on this one, but as said>>certain back-up tools LMV could be pulled in.
    EDIT: Just confirmed, depending on environments on your initial Install, it looks like it is used.
    Code:
    Package: lvm2
    Version: 2.03.16-1ubuntu1
    Priority: optional
    Section: admin
    Origin: Ubuntu
    Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
    Original-Maintainer: Debian LVM Team <team+lvm@tracker.debian.org>
    Bugs: https://bugs.launchpad.net/ubuntu/+filebug
    Installed-Size: 4,162 kB
    Pre-Depends: init-system-helpers (>= 1.54~)
    Depends: libaio1 (>= 0.3.93), libblkid1 (>= 2.24.2), libc6 (>= 2.34), libdevmapper-event1.02.1 (>= 2:1.02.74), libedit2 (>= 2.11-20080614-0), libselinux1 (>= 3.1~), libsystemd0 (>= 233), libudev1 (>= 183), systemd | systemd-tmpfiles, lsb-base, dmsetup (>= 2:1.02.185-1ubuntu1~), dmeventd (>= 2:1.02.185-1ubuntu1~)
    Recommends: thin-provisioning-tools
    Homepage: https://sourceware.org/lvm2/
    Task: server-minimal, cloud-image, ubuntu-live, server, ubuntu-server-raspi, kubuntu-live, xubuntu-live, lubuntu-live, ubuntustudio-dvd-live, ubuntukylin-live, ubuntu-mate-live, ubuntu-budgie-live, ubuntu-unity-live, edubuntu-dvd-live, edubuntu-server-raspi
    Download-Size: 1,187 kB
    APT-Manual-Installed: yes
    APT-Sources: http://archive.ubuntu.com/ubuntu lunar/main amd64 Packages
    Description: Linux Logical Volume Manager
     This is LVM2, the rewrite of The Linux Logical Volume Manager.  LVM
     supports enterprise level volume management of disk and disk subsystems
     by grouping arbitrary disks into volume groups. The total capacity of
     volume groups can be allocated to logical volumes, which are accessed as
     regular block devices.
    
    N: There is 1 additional record. Please use the '-a' switch to see it
    And we know already I use it:
    Code:
    apt policy lvm2
    lvm2:
      Installed: 2.03.16-1ubuntu1
      Candidate: 2.03.16-1ubuntu1
      Version table:
     *** 2.03.16-1ubuntu1 500
            500 http://archive.ubuntu.com/ubuntu lunar/main amd64 Packages
            100 /var/lib/dpkg/status
         2.03.11-2.1ubuntu4 500
            500 http://us.archive.ubuntu.com/ubuntu jammy/main amd64 Packages
    Last edited by 1fallen; April 12th, 2023 at 05:33 PM.
    With realization of one's own potential and self-confidence in one's ability, one can build a better world.
    Dalai Lama>>
    Code Tags | System-info | Forum Guide lines | Arch Linux, Debian Unstable, FreeBSD

  4. #14
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    Re: Ubuntu 20.04 -- What are "stale online ext4 metadata check snapshots"

    Quote Originally Posted by maglin2 View Post
    Did you select encryption during installation?
    (Edit - Long time since I installed 20.04, but looking back at the guide it suggests you have to select LVM to be offered Encryption, not the other way around, and you said in #3 you didn't activate LVM).
    Yes, I did. Problem solved.

  5. #15
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    Re: Ubuntu 20.04 -- What are "stale online ext4 metadata check snapshots"

    Quote Originally Posted by 1fallen View Post
    +1


    You almost had me on that one, had to have a second cup of coffee for that one.
    Yes, indeed, I selected encryption --

    That also explains why
    e2scrub_reap.service

    is on my system, getting rid of those pesky stale online ext4 metadata check snapshots
    (what a mouthful)
    Last edited by bhubunt; April 12th, 2023 at 09:20 PM.

  6. #16
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    Re: Ubuntu 20.04 -- What are "stale online ext4 metadata check snapshots"

    Quote Originally Posted by bhubunt View Post
    (what a mouthful)
    With realization of one's own potential and self-confidence in one's ability, one can build a better world.
    Dalai Lama>>
    Code Tags | System-info | Forum Guide lines | Arch Linux, Debian Unstable, FreeBSD

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